Test case
TestSharedContextVBOES2NEWT1.test03EachWithAnimatorSharedOffscreen()
and similar start failing on OSX after update to 10.9.5 (?).
Test case uses a shared master context on a dummy onscreen drawable
created via factory.createDummy[Auto]Drawable(..).
The GLEventListener issues
glClear(GL.GL_COLOR_BUFFER_BIT | GL.GL_DEPTH_BUFFER_BIT)
and the OpenGL driver set the error state to
GL_INVALID_FRAMEBUFFER_OPERATION
+++
This happens with the Nvidia driver (discrete)
as well as with the Intel driver (integrated).
This happens on a Mac-Mini (Nvidia)
as well as on a Macbook pro (Intel+Nvidia).
+++
We have to investigate,
whether the dummy onscreen drawable's invisible surface
is no more suitable, or we have a other issues.
This could as well be a driver bug.

After triaging, issue turns out to write into the default framebuffer,
i.e. onscreen NSView, while not having created the NSWindow/NSView (deferred)
and not having associated the NSView w/ NSOpenGLContext.
Hence we may describe the new issue w/ 10.9.5 as:
GL_INVALID_FRAMEBUFFER_OPERATION and crash writing to default framebuffer
w/o associating a realized NSView to NSOpenGLContext.